Harry A. Oken, MD
Internal Medicine Physician · Columbia, MD
Harry A. Oken, MD is an internal medicine physician with a practice address in Columbia, Maryland, and NPI 1679566160, issued on Aug 30, 2005. Check the license (Maryland D0031172, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Harry A. Oken
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D0031172 MD
Self-reported in NPPES; status is on the state search - Practice location
- 10700 Charter Dr, Columbia, MD 21044
- Phone
- (410) 910-7500
- Enumerated
- Aug 30, 2005
- Record last updated
- Jan 5, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (410) 910-2310
- Medicaid ID
- 476021200 MD
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 10700 Charter Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Harry A. Oken in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0031172Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average internal medicine physician in 2024
3,091 Medicare Part D claims for 234 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 44 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium291 claims
- Atorvastatin Calcium142 claims
- Amlodipine Besylate100 claims
- Levothyroxine Sodium88 claims
- Escitalopram Oxalate81 claims
- Losartan Potassium79 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $501.44
26 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Harry A. Oken among 3,904 internal medicine physician records in Maryland
Harry A. Oken, MD is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2011 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
93 internal medicine physician records list a practice address in Columbia
They are 93 of the 6,690 NPPES records with a practice address in Columbia, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Columbia → Internal Medicine Physician nationwide →
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Common questions
What is Harry A. Oken, MD's NPI number?
Harry A. Oken, MD's National Provider Identifier (NPI) is 1679566160, issued on Aug 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Harry A. Oken, MD located?
The NPPES record lists a practice address at 10700 Charter Dr, Columbia, MD, 21044. Phone: (410) 910-7500. Providers update this record themselves, so call before visiting.
How can I verify Harry A. Oken, MD's license?
NPPES lists Maryland license number D0031172, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Harry A. Oken, MD prescribe under Medicare Part D?
In 2024, Harry A. Oken, MD had 3,091 Medicare Part D claims for 234 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.